Buglyst Blog
Learn to debug under pressure.
Playbooks for fast pattern recognition, guides for the full investigation, and articles for the engineering judgment around the edges.
17 playbooks · 509 guides · 95 articles · 12 linked practice labs ·skip to practice
Fast pattern recognition for the production failures engineers see most often.
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Structured investigations for the failure modes engineers meet in real systems.
React Query Not Refreshing Stale Data Despite Invalidations
Diagnose and resolve cases where React Query fails to update stale data, even when invalidations or refetches are expected to trigger.
“Module Not Supported” Errors in Next.js Edge Runtime
A real-world guide to diagnosing and fixing 'module not supported' errors when deploying Next.js projects to the Edge Runtime.
React Portal Allows Click Events to Bubble Outside Intended DOM
When using React portals, click or key events can bubble up to unexpected ancestors, triggering handlers outside their intended boundaries.
Vue Reactive Property Not Updating in Template
Diagnose and resolve cases where Vue's reactive data fails to reflect changes in the UI, including edge cases beyond the classic pitfalls.
Diagnosing Nuxt Hydration Mismatch Errors in Production
Hydration mismatch errors in Nuxt apps break SSR interactivity and can be tough to pinpoint. This guide walks through investigating, reproducing, and fixing these.
Why Your Vue Composition API ref Isn’t Reactive
Vue’s Composition API refs sometimes fail to trigger reactivity. This guide covers subtle causes, practical debugging, and real-world fixes for non-reactive refs.
Long-form thinking on debugging habits, observability, and the systems around the bug.
Feature Flag Debt: When Your 500 Conditional Branches Become the Incident
Feature flags are great until they're not. Here's how to audit, remove, and automate cleanup before your 500th conditional branch becomes the root cause of a production incident.
The Art of the Minimal Reproducible Example: A Debugging Superpower
A minimal reproducible example (MRE) is more than just a snippet — it's a tool that isolates the bug, saves time, and gets you faster answers. Here's how to build one that works, with a real-world war story.
The Debugging Mindset: A Systematic Method for Finding Root Causes
A repeatable, hypothesis-driven approach to debugging that works for intermittent failures, performance regressions, and production incidents.
Analyzing a Core Dump: What to Do When Your Process Goes Silent
A core dump is your process's last scream. Here's how to make it talk.
Finding Memory Leaks Step by Step: A Systematic Approach
Memory leaks are the silent killers of long-running services. Here's a repeatable process to hunt them down, from heap dumps to production monitoring.